Hi. I've got a faulty MSO4104 here (not the B version) and it has a bit of a history. Someone at work blew up channel 1 on the 1Meg input many years ago but the scope was still useful on the other three channels (and on 50R input on channel 1). So it has been in use like this for several years.
However, someone at work recently upgraded the firmware on it to V2.68 and this caused it to report a failed SPC self calibration. So it halted the SPC after a few seconds. This left the scope in a bit of a mess with lots of sampling artefacts on the traces and some trace distortion on all four channels. So it became fairly useless.
I've had a look at channel 1 and restored normal operation on the 1 Meg input (a resistor was blown open circuit) and so I was hoping that it would now pass the SPC. However, it still fails although it gets a lot further into the SPC before failing. I think it might be failing on channel 3. Does anyone know what the format is for the error log file? It gives a date and some words and numbers on each line. I think there may be an issue with channel 3.
I also have my own MSO4104 here to compare against. It is running V2.68 FW but it is a newer instrument. Is it possible to go backwards with the firmware to an earlier version of FW? Any other suggestions to get any meaningful debug info from it during the SPC process? Can it be logged remotely whilst doing it?
I've looked through the user and service manuals for stuff about the error log but can't find anything.
